Answer:
Urochordata
Explanation:
Chordata is an animal phylum characterized by four features at some point in their lifetime. These four features are:
- notochord
- pharyngeal slits
- dorsal hollow nerve cord
- post-anall tail
Chordata is further divided into urochordata, cephalochordata and vertebrates.
Urochordates display all the four features of chordates in their larval form but their adult form has none of them except pharyngeal slits. They also change from their free swimming larval form to sessile adult form which means that they attach to a surface unlike the larval form. They also display filter feeding i.e. their food is filtered via the pharyngeal slits. Since all these characteristics are being displayed by the newly discovered species, it belongs to urochordata group.
<span>Four basic processes are involved in the formation of a clastic sedimentary rock:
weathering (erosion)caused mainly by friction of waves, transportation
where the sediment is carried along by a current, deposition and
compaction where the sediment is squashed together to form a rock of this kind.</span>
Estuaries can experience fairly extreme changes in abiotic conditions. For example, estuaries can at different times be dominated by the ocean when freshwater input from upstream is minimal, or it can be freshwater dominated when there is a lot of flow coming into the estuary from upstream. This means that organisms that exist within estuaries must be able to tolerate a wide range of salinities. These are called euryhaline organisms. Estuary ecosystems also receive biotic inputs from both the ocean and from the upstream river. There are therefore a lot of scavengers that thrive within estuaries, such as crabs, mud prawns and clams. One primary producer group that is important for estuaries are mangroves, but they are not found in all estuaries. Estuaries act as important nursery areas for ocean fish, who come into the estuary to spawn.